package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Slf4j
@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //1.查询购物车和地址是否有数据
        //查询当前用户购物车中是否有数据
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if(shoppingCartList == null && shoppingCartList.size() == 0){
            //抛出业务异常
            throw  new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //查询地址是否为空
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook == null){
            //抛出业务异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //2.向订单表插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setUserId(BaseContext.getCurrentId());
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        //设置地址
        orders.setAddress(addressBook.getDetail());
        orderMapper.insert(orders);

        //3.向订单明细表插入多条数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        shoppingCartList.forEach(shoppingCart1 -> {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(shoppingCart1,orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetailList.add(orderDetail);
        });
        orderDetailMapper.insertBatch(orderDetailList);

        //4.清空购物车
        shoppingCartMapper.deleteByUserId(BaseContext.getCurrentId());

        //5.封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderAmount(orders.getAmount())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .build();
        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

//        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }

        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code","ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        //修改订单状态
        paySuccess(ordersPaymentDTO.getOrderNumber());

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)//订单状态，待接单
                .payStatus(Orders.PAID)//支付状态，已支付
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        Map map = new HashMap<>();
        map.put("type",1);
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号：" + outTradeNo);

        String jsonString = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);
    }

    /**
     * 历史订单查询
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult historyOrdersList(OrdersPageQueryDTO ordersPageQueryDTO) {
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        //pageHelper插件
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());

        Page<OrderVO> orderVOPage = orderMapper.list(ordersPageQueryDTO);
        //查询订单详情，并封装到每个订单的orderVO中
        orderVOPage.forEach(orderVO -> {
            List<OrderDetail> orderDetails = orderDetailMapper.list(orderVO.getId());
            orderVO.setOrderDetailList(orderDetails);
        });
        return new PageResult(orderVOPage.getTotal(),orderVOPage.getResult());
    }

    /**
     * 查询订单详情
     * @param id
     * @return
     */
    public OrderVO getById(Long id) {
        //查询订单表
        OrderVO orderVO =orderMapper.getByOrderId(id);
        //查询订单详情表
        orderVO.setOrderDetailList(orderDetailMapper.list(id));

        return orderVO;
    }

    /**
     * 用户取消订单
     * @param orderId
     */
    public void cancalOrder(Long orderId) {

        // 根据id查询订单
        Orders ordersDB = orderMapper.getByOrderId(orderId);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = Orders.builder()
                .id(orderId)
                .cancelTime(LocalDateTime.now())
                .status(Orders.CANCELLED)
                .payStatus(Orders.REFUND)
                .cancelReason("用户取消")
                .build();
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     * @param orderId
     */
    @Transactional
    public void buyAgain(Long orderId) {
        List<OrderDetail> orderDetailList = orderDetailMapper.list(orderId);
        orderDetailList.forEach(orderDetail -> {
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(orderDetail,shoppingCart);
            shoppingCart.setUserId(BaseContext.getCurrentId());
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);
        });
    }

    /**
     *用户催单
     @Override
     public void reminder(Long id) {

     }
     * @param id
     */
    public void reminder(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getByOrderId(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Map map = new HashMap<>();
        map.put("type",2);
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号：" + ordersDB.getNumber());

        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

    /**
     * 管理端页面查询
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult pageQuery(OrdersPageQueryDTO ordersPageQueryDTO) {
        //pageHelper插件
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());

        Page<OrderVO> page = orderMapper.list(ordersPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 各个状态的订单数量统计
     *
     * @return
     */
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 接单
     * @param ordersConfirmDTO
     */
    public void confirmOrder(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     * @param id
     */
    public void deliveryOrder(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getByOrderId(id);

        // 校验订单是否存在，并且状态为3
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = Orders.builder()
                .id(id)
                .status(Orders.DELIVERY_IN_PROGRESS)
                .build();
        orderMapper.update(orders);
    }

    /**
     * 完成订单
     *
     * @param id
     */
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getByOrderId(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 商家取消订单
     * @param ordersCancelDTO
     */
    public void cancelOrder(OrdersCancelDTO ordersCancelDTO) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getByOrderId(ordersCancelDTO.getId());

        if(ordersDB.getPayStatus() == Orders.PAID){
            log.info("申请退款，订单id：{}",ordersCancelDTO.getId());
        }
        // 根据id查询订单
        Orders ordersDD = orderMapper.getByOrderId(ordersCancelDTO.getId());

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDD.getStatus() == Orders.COMPLETED) {
            throw new OrderBusinessException("订单已完成");
        }
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setPayStatus(Orders.REFUND);
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 拒单
     *
     * @param ordersRejectionDTO
     */
    public void rejectionOrder(OrdersRejectionDTO ordersRejectionDTO){
        // 根据id查询订单
        Orders ordersDB = orderMapper.getByOrderId(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == Orders.PAID) {
            log.info("退款，订单id：{}",ordersRejectionDTO.getId());
        }

        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setPayStatus(Orders.REFUND);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }
}
